fff ffi ffn ffo ffs ffw fif fii fin fis fnf fni fnn fns fnw fof foi fon foo fos fow fsf fsi fsn fso fss fsw fwf fwi fwn fwo fws i-f iff ifi ifn ifo ifs iif iii iin iio iis iiw in- inf ini inn ino ins io- iof ioi ion ioo ios iow is- isf isi isn iso iss isw iwf iwi iwo iws iww n-i nff nfi nfn nfo nfs nif nii nin nio nis nnf nni nnn nno nns nnw no- nof noi non noo nos now nsf nsi nsn nso nss nsw nwf nwi nwn nwo nws o-i of- off ofi ofn ofo ofs ofw oif oii oin oio ois on- onf oni onn ono ons oo- oof ooi oon ooo oos oow os- osf osi osn oso oss osw owf owi own owo ows oww sff sfi sfn sfo sfs sfw sif sii sin sio sis siw snf sni snn sno sns snw sof soi son soo sos sow ss- ssf ssi ssn sso sss ssw swf swi swn swo sws wff wfi wfn wfo wfs wfw wif wii win wis wn- wnf wnn wno wns wnw wof woi won woo wos wow wsf wsi wsn wso wss wsw wwf wwi wwn wwo www